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<p>A novel deep eutectic solvent (ChCl/HGA-DES) was prepared by a mixture of two moles of choline chloride (ChCl) and one mole of 2,3-dihydroxybenzoic acid (hypogallic acid, HGA). The eutectic point phase diagram showed that the two moles of ChCl and one mole of HGA is the best molar ratio for synthesizing a novel DES. Then, ChCl/HGA-DES was characterized by the FT-IR, TGA/DTA, densitometer, eutectic points, and <sup>1</sup>HNMR techniques and used as a novel and capable catalyst for the green synthesis of six new benzo[4,5]thiazolo[3,2-<i>a</i>]- chromeno[4,3-<i>d</i>]pyrimidin-6-ones <b>5(a-f)</b> and five new (2-(2-hydroxyphenyl)-8-methyl-4-phenyl-4<i>H</i>-benzo[4,5]thiazolo[3,2-<i>a</i>]pyrimidin-3-yl)(morpholino)methanones <b>6(a-e)</b> through one-pot condensation reactions.</p>

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The ChCl/HGA-based DES as a capable and new catalyst for the green synthesis of benzo[4,5]thiazolo[3,2-a]chromeno[4,3-d]pyrimidin-6-one

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  • 出版模式：

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  • 发表日期：

    2025年3月3日

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  • Elnaz Chegeni,
  • Davood Habibi,
  • Arezo Monem,
  • Zahra Jahaniyan

摘要

A novel deep eutectic solvent (ChCl/HGA-DES) was prepared by a mixture of two moles of choline chloride (ChCl) and one mole of 2,3-dihydroxybenzoic acid (hypogallic acid, HGA). The eutectic point phase diagram showed that the two moles of ChCl and one mole of HGA is the best molar ratio for synthesizing a novel DES. Then, ChCl/HGA-DES was characterized by the FT-IR, TGA/DTA, densitometer, eutectic points, and 1HNMR techniques and used as a novel and capable catalyst for the green synthesis of six new benzo[4,5]thiazolo[3,2-a]- chromeno[4,3-d]pyrimidin-6-ones 5(a-f) and five new (2-(2-hydroxyphenyl)-8-methyl-4-phenyl-4H-benzo[4,5]thiazolo[3,2-a]pyrimidin-3-yl)(morpholino)methanones 6(a-e) through one-pot condensation reactions.